Structure characteristics and adhesive property of humic substances extracted with different methods  

作　　者：张元波 韩桂洪 姜涛 黄艳芳 李光辉 郭宇峰 杨永斌 

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University

出　　处：《Journal of Central South University》2011年第4期1041-1046,共6页中南大学学报（英文版）

基　　金：Project(50725416) supported by the National Science Fund for Distinguished Young Scholars of China;Project(50804059) supported by the National Natural Science Foundation of China;Project(200805331080) supported by Specialized Research Fund for the Doctoral Program of Higher Education of China;Project supported by the Graduate Degree Thesis Innovation Foundation of Central South University,China

摘　　要：The structure characteristics and adhesive property of humic substance(HS) extracted with different methods were mainly studied by terms of elementary analysis,visible spectrum,FT-IR spectroscopy,viscosity,adsorption and pelletizing experiments.The results show that HSs extracted with new method(HS-a) own higher degree of aromatization and polymerization,larger relative molecular mass and more polar functional groups than HS extracted with usual method(HS-b).The viscosity of HS-b is about 30-40 mPa·s lower than that of HS-a.The maximum adsorption amounts of HS-a and HS-b onto iron concentrates are 9.11 mg/g and 8.08 mg/g,respectively.Meanwhile,HS-a has a better performance than HS-b in the practical application for pelletizing of iron concentrates.The difference in agglomeration behaviors with iron concentrates lies in the differences of the structure characteristics of HSs.With higher content of polar functional groups,larger relative molecular mass and viscosity of HSs,the agglomeration behavior is improved.The structure characteristics and adhesive property of humic substance （HS） extracted with different methods were mainly studied by terms of elementary analysis, visible spectrum, FT-IR spectroscopy, viscosity, adsorption and pelletizing experiments. The results show that HSs extracted with new method （HS-a） own higher degree of aromatization and polymerization, larger relative molecular mass and more polar functional groups than HS extracted with usual method （HS-b）. The viscosity of HS-b is about 30- 40 mPa.s lower than that of HS-a. The maximum adsorption amounts of HS-a and HS-b onto iron concentrates are 9.11 mg/g and 8.08 mg/g, respectively. Meanwhile, HS-a has a better performance than HS-b in the practical application for pelletizing of iron concentrates. The difference in agglomeration behaviors with iron concentrates lies in the differences of the structure characteristics of HSs. With higher content of polar functional groups, larger relative molecular mass and viscosity of HSs, the agglomeration behavior is improved.

关 键 词：humic substances structure characteristic agglomeration behaviour green ball 

分 类 号：TF046[冶金工程—冶金物理化学]